What happens to energy over the course of a reaction?

2 answers:

5 0

Over the course of a reaction the energy changes forms, in the beginning it may be used to produce a set of products, but in the end it can produce energy in the form of a combustion reaction.

koban [17]3 years ago

4 0

Of course it changes forms

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Does moisture affect the length of time it takes for mold to grow on bread?

Pavlova-9 [17]

Answer:

it depends on the level of moisture of the bread wet bread molds more quickly than dry bread because mold thrives in damp environments if you didn't experiment and tested one slice of dry bread and one damp slice of the same bread the dampened slice would grow mold much more quickly than the dry one

I hope this helps have a good dày or night :)

3 0

3 years ago

The reaction of Pb+4 and O-2 produces the compound of

vovikov84 [41]

Answer:

Pb₂O₄

Explanation:

The given species are:

Pb⁴⁺ O²⁻

Now, to solve this problem, we use the combining powers which corresponds to the number of electrons usually lost or gained or shared by atoms during the course of a chemical combination.

Pb⁴⁺ O²⁻

Combining power 4 2

Exchange of valencies 2 4

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4 0

3 years ago

Which of the following statements about organic chemistry is correct? Be careful, there may only be one word incorrect.

Leokris [45]

In "condensed structural formula" each carbon atom and its attached hydrogen atoms are written in group in the linear form is correct about organic chemistry.

Option B

Explanation:

"condensed structural formula" is a method of writing or presenting organic structures in line of text. It presents all the atoms, but excludes the vertical bonds and all the horizontal single bonds. In condensed structural formula, or we can say semi-structural formula, covalent bonds are not always presented or shown. When the formula or representation is written in line with covalent bonds being shown, then it is referred to as linear formula. For example- the condensed structural formulas of ethane, propane, and ethanol is written as follows:-

$\mathrm{CH}_{3} \mathrm{CH}_{3},\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{3},\text { and } \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}$